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The FBI and congressional committees are investigating whether the Trump campaign colluded with Russia to meddle in the presidential election. Here is a roundup from NBC News of 10 times that Donald Trump has denied the allegation. (Published Tuesday, July 11, 2017)

Russian President Vladimir Putin said Sunday the United States would have to cut its embassy and consulate staff in Russia by 755, heightening tensions between Washington and Moscow three days after the U.S. Congress approved sanctions against Russia.

In response, the U.S. State Department deemed it "a regrettable and uncalled for act."

Russian's Foreign Ministry on Friday ordered a reduction by Sept. 1 in the number of U.S. diplomatic personnel in Russia. It said it is ordering the U.S. Embassy to limit the number of embassy and consular employees in the country to 455 in response to approval of the new package of American sanctions. The White House has said U.S. President Donald Trump would sign those sanctions into law.

The legislation, which also targets Iran and North Korea, seeks to punish Moscow for meddling in the 2016 U.S. election and for its military aggression in Ukraine and Syria.

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"We had hoped that the situation will somehow change, but apparently if it changes, it won't be soon," Putin said in an interview televised on Rossiya 1, explaining why Moscow decided to retaliate. "I thought it was the time to show that we're not going to leave it without an answer."

Russia is open to cooperating with the U.S. on various issues, including terrorism and cybercrime, but instead it "only hears unfounded accusations of meddling in U.S. domestic affairs," he said.

Putin said more than 1,000 people are currently employed at the Moscow embassy and three U.S. consulates in Russia. They include both Americans and Russians hired to work in the diplomatic offices.

The Russian leader did not explain how the figure of 755 positions was calculated.

In a statement, the State Department said: "This is a regrettable and uncalled for act. We are assessing the impact of such a limitation and how we will respond to it. We have no further comment at this time."

The State Department declined to give an exact number of American diplomats or other U.S. officials in Russia, but the figure is believed to be about 400, some of whom have families accompanying them on diplomatic passports.

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President Donald Trump signed an executive order Thursday, Oct. 12, 2017, seeking to expand insurance coverage across state lines through so-called association health plans. Those health plans will not exclude workers or charge more to those in poorer health, according to the White House.

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The vast majority of the more than 1,000 employees at the various US diplomatic missions in Russia, including the embassy in Moscow and consulates in St. Petersburg, Vladivostok and Yekaterinburg, are local employees.

Asked about the potential for additional sanctions against Washington, Putin described the reduction in diplomatic staff as "painful" and said he currently opposes further measures.

"We certainly have something to respond with and restrict those areas of joint cooperation that will be painful for the American side, but I don't think we need to do it," he said, adding that such steps could also harm Russian interests.

Putin mentioned space and energy as the main areas where Russia and the United States have successfully pursued projects together.

Along with the cap on the size of the U.S. diplomatic corps in Russia, the Russian foreign ministry on Friday said it also was closing down a U.S. recreational retreat on the outskirts of Moscow as well as warehouse facilities.

The diplomatic tit-for-tat started under former U.S. President Barack Obama. In response to reports of Russian meddling in the 2016 presidential election, Obama ordered the expulsion of 35 Russian diplomats and shut down two Russian recreational retreats in the U.S.

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